With the level 75 death minion, Animate seems like it would be a little under utilized now since you can get something better with fewer pips. I think the Death rank X spell should be changed to one of the following:
Dark Gift: The next spell cast will heal the caster for 15% of the damage dealt per pip over three rounds. This could be cast on any ally.
Revenge: The next incoming spell will deal 10% damage per pip back to the caster as
Drain: Deal 70 damage per pip and heal the caster for 50%
As for Myth, I think lacking a viable X spell is understandable given their minions, but I think a good way to add to that without being over powered is to use one of the following:
Myth Fortune: Increase the damage of the next incoming minion spell by 6% per pip.
Myth Boon: Increase the health of the next summoned minion by 5% and damage by 1% per pip.